I have a application that require 65W 18VDC @ 3A input. My power supply will only output 15VDC, 200mA. Is there a boost converter that can meet my require volts and amps. If not can I do this, use to power supply that will out but 15VDC, 200mA. Use 2 converter, one to converter 15VDC @200mA to 18VDC and the other converter to boost 15VDC @200mA to 3-4amps. Wire the two converter together to get the output of 18VDC @ 3A